Image Resolution, Resizing and Interpolation
Resolution is used very often in the computer world. Every image has a resolution and understanding resolution will ensure the sharpest output for the images. Interpolation is the process of adding or subtracting pixels from the image whenever you enlarge or reduce an image size.
Tina knows the importance of image resolution. It refers to how many pixels are present in an image. Understanding and using the correct resolution for your images will ensure the sharpest output for every occasion. The more pixels present, the sharper the image will appear. Let us see some other related aspects for working with images.
Interpolation
The pixels are added or subtracted whenever the image size changes. This process is called image interpolation. The five different methods available in Photoshop are,
- Nearest Neighbour - The quickest method with the lowest quality.
- Bilinear - Best for line art
- Bicubic - Default mode, high quality and best for most purposes.
- Bicubic smoother - best when you are increasing the size of the image.
- Bicubic sharper - Best when reducing the size of an image.
Resizing
To change the size of a picture open an image. Choose Image > Image size. The image size dialog box opens.
Click the resample image button. Choose constrain proportions to maintain the image's proportion. Choose ok. The image will change to the desired size.
Change Image Resolution
To Change Image resolution Open an image, choose Image > Image size. Uncheck the resample image box and enter the desired resolution as shown. Click ok.
